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Idk what I’m doing wrong. The static PCs won’t ping the DHCP PCs.

OpenDoors
Level 1
Level 1

This is the instructions. I created the PT top left to bottom to right following the instructions. 

Physical Configuration:

Create the following network in Packet Tracer version 8:

    • 2 - Switches(2960), connected together using Ethernet Cables via port G0/2
      • Label as S_East and S_West
    • 4 - Computers using DHCP, 2 attached to each switch
      • On S_East label the Computers PC_East 1 and PC_East 2 
      • On S_West label the Computers PC_West 1 and PC_West 2
    • 1 - Router(2901), Labeled R_ROAS, connected to S_West using Ethernet Cable via port Gi0/1(switch and router)
    • 1 - Switch(2960), Labeled S_North, connected to R_ROAS using Ethernet Cable via port Gi0/1(switch)
    • 2 - Computers using static IP attached to S_North
      • Label the Computers PC_North 1 (fa0/11) with IP 192.168.4.11, and PC_North 2 (fa0/22) with IP 192.168.4.22
    • 1 – Switch(2960), Labeled S_South, connected to S_North with Layer 2 Etherchannel using 4 fast ethernet lines

General Configuration:

Establish the following where necessary:

    • DHCP (on R_ROAS) for network using 192.168.1.0/24
      • Exclude .1-.10 from the DHCP scope so they aren't handed out
      • DNS server ip is 192.168.1.5
      • Domain name is ACME.com
    • Statically assign IP's to all Infrastructure devices - use first available IP for each network on R_ROAS
    • On R_ROAS - Gi0/1 will use 192.168.1.0/24 network, Gi0/0 will use 192.168.4.0/24 network

 

I BELIEVE I DID THE ABOVE BUT THE STATIC PCS ON THE RIGHT WONT PING THE PCS TO THE LEFT PASSED THE ROUTER. 

 

THESE ARE PING RESULTS:

 

North PCs ping each other 

North PCs ping Router

Router pings itself
Router does not ping any East or West devices

Router pings both North devices

 

I personally believe it’s the dhcp confit or the default gateway? I’m just lost at this point. Please help.

4 Accepted Solutions

Accepted Solutions

Hello,

 

post the zipped Packet Tracer project (.pkt) file...

View solution in original post

Ok will do. I need at least 30 mins as I’m not home rn. 

View solution in original post

Hello,

 

the problem was that none of your PCs on the left were getting an IP address at all, because of a typo in the excluded range on the router:

 

ip dhcp excluded-address 192.168.1.1 192.169.1.49

 

After changing this to:


ip dhcp excluded-address 192.168.1.1 192.168.1.49

 

all PCs get an IP address, and everything has full end-to-end connectivity.

 

Attached the revised, working file.

View solution in original post

I feel so defeated. I spent all night trying to find the error and it was 1 number. 

View solution in original post

8 Replies 8

VDavidCC
Level 1
Level 1

Hello, could you please paste the running-config of R_ROAS and the output of the Show ip dhcp binding command

The sh ip dhcp binding does not work on my router. I also tried others that involve dhcp and still no results. 

Hello,

 

post the zipped Packet Tracer project (.pkt) file...

Ok will do. I need at least 30 mins as I’m not home rn. 

 

Hello,

 

the problem was that none of your PCs on the left were getting an IP address at all, because of a typo in the excluded range on the router:

 

ip dhcp excluded-address 192.168.1.1 192.169.1.49

 

After changing this to:


ip dhcp excluded-address 192.168.1.1 192.168.1.49

 

all PCs get an IP address, and everything has full end-to-end connectivity.

 

Attached the revised, working file.

I feel so defeated. I spent all night trying to find the error and it was 1 number. 

Building configuration...

 

Current configuration : 1010 bytes

!

version 15.1

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

!

hostname R_ROAS

!

!

!

!

ip dhcp excluded-address 192.168.1.1 192.169.1.49

ip dhcp excluded-address 192.168.1.1 192.168.1.49

!

ip dhcp pool ACME

network 192.168.1.0 255.255.255.0

default-router 192.168.1.1

dns-server 192.168.1.5

!

!

!

ip cef

no ipv6 cef

!

!

!

username cisco privilege 15 secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1

!

!

license udi pid CISCO2901/K9 sn FTX152487AI-

!

!

!

!

!

!

!

!

!

ip domain-name ACME.com

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface GigabitEthernet0/0

ip address 192.168.4.1 255.255.255.0

ip helper-address 192.168.1.0

duplex auto

speed auto

!

interface GigabitEthernet0/1

ip address 192.168.1.1 255.255.255.0

duplex auto

speed auto

!

interface Vlan1

no ip address

shutdown

!

router rip

!

ip default-gateway 192.168.1.1

ip classless

!

ip flow-export version 9

!

!

!

!

!

!

!

!

line con 0

!

line aux 0

!

line vty 0 4

login

!

!

!

end

 

 

 

 

R_ROAS#sh ip dhcp

R_ROAS#sh ip dhcp binding

IP address Client-ID/ Lease expiration Type

Hardware address

R_ROAS#

 

 

 

 

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